#include <iostream>
using namespace std;

class Person
{
public:
    int getAge()
    {
        return m_age;
    }

private:
    int m_age;
};

class Student
{
public:
int getAge()
{
    return m_age;
}
int getScore()
{
    return m_score;
}

private:
    int m_age;
    int m_score;
};

class Employee
{

};

int main()
{
    cout<<"hello world"<<endl;
    return 0;
}